QUANTIZATION FOR VIDEO ENCODING OR DECODING BASED ON THE SURFACE OF A BLOCK

(19)

(11)

EP 4 351 144 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	22.05.2024 Bulletin 2024/21

(43)	Date of publication A2:
	10.04.2024 Bulletin 2024/15

(21)	Application number: 24157165.2

(22)	Date of filing: 21.10.2019

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International Patent Classification (IPC):

H04N 19/124^(2014.01)
H04N 19/174^(2014.01)
H04N 19/593^(2014.01)
H04N 19/70^(2014.01)

H04N 19/176^(2014.01)
H04N 19/503^(2014.01)
H04N 19/467^(2014.01)

(52)	Cooperative Patent Classification (CPC):
	H04N 19/124; H04N 19/176; H04N 19/174; H04N 19/503; H04N 19/593; H04N 19/467; H04N 19/70

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

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Priority:

08.11.2018 EP 18306469
21.12.2018 EP 18306824

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	19798824.9 / 3878175

(71)	Applicant: InterDigital VC Holdings, Inc.
	Wilmington, DE 19809 (US)

(72)	Inventors:
	DE LAGRANGE, Philippe 35830 BETTON (FR) BORDES, Philippe 35890 LAILLE (FR) FRANCOIS, Edouard 35890 BOURG DES COMPTES (FR)

(74)	Representative: Interdigital
	Immeuble ZEN 2 845 A, avenue des Champs Blancs 35510 Cesson-Sévigné 35510 Cesson-Sévigné (FR)

(54)	QUANTIZATION FOR VIDEO ENCODING OR DECODING BASED ON THE SURFACE OF A BLOCK

(57) An image is split into a plurality of blocks of various sizes and a subdivision level counter is associated to each of the blocks. The value of this subdivision level counter for a block is representative of the size of the block and is used to determine the quantization parameter for the block. The value is propagated for each subdivision and incremented according the type of the subdivision. When the image is split, an analysis is done according to the subdivision level counter, a maximal value of subdivision and the type of split, in order to determine the start of a new quantization group and when it is the case, the current position of the partition is propagated to the further split partitions to be stored with these partition and serve in the prediction process when decoding.

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